Improvement in steam-generators



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Letters Patent No. 93,240, dated August 3, 1869.

IMPROVEMENT 1N sTnaM-enNnRATons.-

The Schedule referred to in these Letters Patent and making part of the same. v

To all whom it may concern.-

Be it known that we, HIRAM B. SMITH and J. V. STEVENS, of Pomeroy, in lthe county of Meigs, and State of Ohio, have invented a new and improved Steam-Generator; and we 'do hereby declare thatthe following is a full, clear, and exa'ct description thereof, which will enable Others skilled in the art to make and use the same, reference being had to theaccompanyin drawing, forming part of this specification.

The Object ot' this invention is to provide an im# proved arrangement of steam-generating apparatus, calculated to simplify the construction and to facilitate the generation of steam economically; also to-admit of changing the position of the tubes from time to time, placing the bottom sides upward, so that the scale pre- .viously formedwill. be. thrown Off, all as hereinafter more fully specified. y

Figure l represents a partial transverse and sec; tional elevation, taken on the line x-:v of iig. 2, and v Figure 2 represents a longitudinal sectional eleva-4 tion, taken on the line g/-y Oftig. l.-

Similar letters of reference indicate corresponding parts.

We construct our improved boiler principally of tubes A, having rectangular chambers B at the ends, which in their united form constitute hollow end walls, and, when preferred, hollow side walls, av fre'e watercirculatiou being maintained in the said tubes and hollow walls, and the nre-space being around the exterior Of said tubes, and within Kthe walls.

The lower tier ot' tubes is laid at the front, so that the walls of the rectangular chambers rest on a hollow mantel, or bridge, C, over the nre-doors, and at the rear upon the top wallet' the mud-space D, and the other tubes are similarly laid on the first, so that the said chambers, mantel, and mud-space form doubleend walls, having water-spaces, which communicate through holes E, suitably formed in the said walls of vthe chambers B, to coincide when the tubes are placed in position, and permit a free circulation in all directions between vthe said end walls and with the i11- terior ofthe tubes.

These rectangular chambers B are of uniform size and shape, so that when placed in position they form close and compact walls, and they are designed to be packed around the passages E, to form steam-tight pressions around the said passages for the reception of packing of rubber or other substance.

-These chambers are'thus bolted together on all sides, and they are similarly joined to the side walls and water-passages G, similarly formed between them.

The ends of the tubes are enclosed by heads H.

Any number of rows of these tubes maybe thus supportthe said drums, and lhave passages leading into them.

These drums'may'have similar connections O yat' the top, for the steam dome, (not shown.)

l? represents an openinginto the space between the side walls, `for cleaning the said space, and l Q, a similar opening to the mud-space.

Similar openings may be made for access to the hol low bridge C and to other parts.

R represents a hood, into which the product of i combustion passes, over the top of the rear wall, and between the drums, as atl S.

The double side walls may be dispensed with, if preferred, and brick or other walls substituted.

This arrangement'of the tubes admits of changing them, by turning them over from time to time, to present new exterior surface to the action of thehottest part 'ofthe fire, when the' parts most exposed have be.- cOme weakened. This turning aiso serves a good purpose in removing the scale, which willbegradually thrown ofi' when suspended from the upper surface 'of` the tubes. v

Having thus described our invention,

What we claim as new, and desire to secure by-Let ters Patent, is-

1. The tubes A, and chamber, or head B, formedin one piece, as herein shown and described.

2. The hollow bridge C, mud-chamber D, and tubes A, combined and arrangedsubstantially as specified.

3. The combination of the tubes A and drums I,

when arranged and united substantially as specified.

' HIRAM B. SMITH.

Witnesses: J. V. STVENS.

GEO. D. HEBARD,

GEORGE LEE. 

